113 lines
3.8 KiB
Java
113 lines
3.8 KiB
Java
/*
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* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutputStream;
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import java.util.HashSet;
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import java.util.Random;
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import java.util.concurrent.ThreadLocalRandom;
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/*
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* @test
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* @bug 8016252
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* @summary Verify that a serialized HashSet may successfully be deserialized.
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* @key randomness
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*/
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public class Serialization {
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private static final int NUM_SETS = 43;
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private static final int MAX_CAPACITY = 257;
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private static final float MAX_LOAD_FACTOR = 100.0F;
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private static final Random rnd = ThreadLocalRandom.current();
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private static HashSet<Integer> createHashSet() {
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int capacity = rnd.nextInt(MAX_CAPACITY);
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float loadFactor = Float.MIN_VALUE + rnd.nextFloat()*MAX_LOAD_FACTOR;
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HashSet<Integer> hashSet = new HashSet<Integer>(capacity, loadFactor);
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float multiplier = 2*rnd.nextFloat(); // range [0,2]
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int size = (int)(capacity*loadFactor*multiplier);
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for (int i = 0; i < size; i++) {
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hashSet.add(rnd.nextInt());
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}
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return hashSet;
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}
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private static HashSet<Integer> serDeser(HashSet<Integer> hashSet) throws IOException, ClassNotFoundException {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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ObjectOutputStream oos = new ObjectOutputStream(baos);
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oos.writeObject(hashSet);
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oos.flush();
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ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
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ObjectInputStream ois = new ObjectInputStream(bais);
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HashSet<Integer> result = (HashSet<Integer>)ois.readObject();
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oos.close();
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ois.close();
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return result;
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}
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private static void printHashSet(HashSet<Integer> hashSet) {
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System.err.println("Size: "+hashSet.size());
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for (Object o : hashSet) {
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System.err.println(o);
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}
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}
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public static void main(String[] args) {
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int failures = 0;
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for (int i = 0; i < NUM_SETS; i++) {
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HashSet<Integer> hashSet = createHashSet();
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HashSet<Integer> result = null;
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try {
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result = serDeser(hashSet);
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} catch (IOException ioe) {
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System.err.println(ioe);
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failures++;
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} catch (ClassNotFoundException cnfe) {
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System.err.println(cnfe);
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failures++;
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}
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if (!hashSet.equals(result)) {
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System.err.println("Unequal HashSets!");
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printHashSet(hashSet);
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System.err.println();
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failures++;
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}
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}
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if (failures != 0) {
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throw new RuntimeException("HashSet/Serialzation failed with "+
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failures+" failures!");
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}
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}
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}
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